Charging system power distribution method, charging controller and charging system

Abstract

The application provides a charging system power distribution method, a charging controller and a charging system, and relates to the technical field of intelligent charging piles.The application does not directly distribute power based on the demand power of a charging terminal when distributing power of a charging system, but distributes power based on a second power limit parameter of the charging terminal, which is determined according to a first power limit parameter and the demand power of each charging terminal.Through considering the first power limit parameter in the second power limit parameter participating in power distribution, the application realizes the equal distribution of charging power between charging terminals with large differences in demand power, improves the accuracy and precision of the power limit of the charging terminal, thereby maximizing the simultaneous charging demand of multiple charging terminals, ensuring that the total output power does not exceed the set power limit, and improving the user experience in the multi-gun charging system.

Description

Technical Field

[0001] This invention relates to the field of smart charging pile technology, and in particular to a power distribution method for a charging system, a charging controller, and a charging system. Background Technology

[0002] With the rapid development of new energy electric vehicles, the demand for charging pile power is constantly increasing. However, in certain scenarios, such as peak electricity consumption periods, it is necessary to limit the total output power of the charging system. Current high-power DC charging piles achieve power output distribution among multiple charging terminals through power scheduling and allocation of multiple power modules. For example, Figure 1 As shown, the charging system includes n power modules (module 1 to module n) and two charging guns (charging gun A and charging gun B). Each charging gun can be connected to a charging terminal, so the charging system can realize the power output distribution of two charging terminals.

[0003] Current power limiting algorithms typically allocate power based on the power demand ratio of charging gun A and charging gun B. Under this algorithm, even if a charging terminal does not reach the current limiting point, it may still be current-limited. For example, if charging gun A requires 90kW and charging gun B requires 10kW, and the current limiting point (limited total output power) is 60kW, using a demand-based power limiting algorithm, charging gun A is current-limited to 54kW and charging gun B to 6kW. However, due to the granularity of power module output power in the charging system, when the system has only two 30kW power modules and both guns are charging simultaneously, one power module is allocated to each charging gun. Charging gun A can actually only output 30kW, but charging gun B is limited to 6kW. However, when charging gun A outputs 30kW, charging gun B's output of its required power of 10kW also does not reach the current limiting point of 60kW. Therefore, this method affects the charging of charging gun B, meaning that existing power limiting algorithms suffer from the problem of over-limiting charging terminals with low power demand. Summary of the Invention

[0004] The purpose of this invention is to provide a power distribution method, a charging controller, and a charging system to maximize the charging needs of multiple charging terminals simultaneously while ensuring that the total output power does not exceed the set power limit.

[0005] In a first aspect, embodiments of the present invention provide a power allocation method for a charging system, comprising:

[0006] Obtain the current power allocation data of the charging system. The power allocation data includes the number of charging terminals, the number of available power modules, the maximum system output power, and the power requirement of each charging terminal. The maximum system output power is the maximum output power currently allowed by the charging system.

[0007] Based on the number of charging terminals and the number of available power modules, a first power limit parameter is determined, and based on the first power limit parameter and the power requirement of each charging terminal, a second power limit parameter for the corresponding charging terminal is determined; wherein, the first power limit parameter is used to characterize the maximum power output by the charging system to a single charging terminal when each charging terminal is allocated at least one power module;

[0008] Based on the second power limit parameter of each charging terminal and the maximum system output power, power is allocated to each charging terminal to obtain the power allocation result.

[0009] Furthermore, obtaining the current power allocation data of the charging system includes:

[0010] Obtain the number of charging terminals currently in use by the charging system to obtain the total number of charging terminals;

[0011] Obtain the current required voltage and current of each charging terminal, and calculate the required power of each charging terminal based on the current required voltage and current of each charging terminal.

[0012] Furthermore, before determining the first power limit parameter based on the number of charging terminals and the number of available power modules, the charging system power allocation method further includes:

[0013] The total power demand is obtained by summing the power demand of each of the charging terminals.

[0014] Determine whether the total power demand is greater than the maximum system output power;

[0015] If so, perform the step of determining the first power limit parameter based on the number of charging terminals and the number of available power modules.

[0016] Furthermore, the power distribution method of the charging system also includes:

[0017] If not, the smaller of the required power of each charging terminal and the maximum output power of the power module corresponding to the charging terminal shall be determined as the target allocated power of the corresponding charging terminal.

[0018] Further, determining the first power limiting parameter based on the number of charging terminals and the number of available power modules includes:

[0019] The first power limit parameter is calculated based on the number of charging terminals, the number of available power modules, and the preset maximum module output power; wherein, the maximum module output power is the maximum output power of a single power module.

[0020] Further, determining the second power limiting parameter of the corresponding charging terminal based on the first power limiting parameter and the power demand of each charging terminal includes:

[0021] The smaller of the first power limit parameter and the power requirement of each charging terminal is determined as the second power limit parameter of the corresponding charging terminal.

[0022] Further, the step of allocating power to each of the charging terminals based on the second power limit parameter of each charging terminal and the maximum system output power to obtain a power allocation result includes:

[0023] Based on the second power limit parameter of each charging terminal, the power ratio of each charging terminal is determined;

[0024] According to the power ratio of each charging terminal, the maximum system output power is allocated to each charging terminal to obtain the initial allocated power of each charging terminal.

[0025] The target power allocation for each charging terminal is determined based on its initial power allocation.

[0026] Further, determining the target allocation power for each charging terminal based on its initial allocation power includes:

[0027] The minimum of the initial allocated power, the required power, and the maximum output power of the power module corresponding to each charging terminal is determined as the target allocated power of the corresponding charging terminal.

[0028] Secondly, embodiments of the present invention also provide a charging controller, including a memory and a processor, wherein the memory stores a computer program that can run on the processor, and the processor executes the computer program to implement the charging system power distribution method described in the first aspect.

[0029] Thirdly, embodiments of the present invention also provide a charging system, including at least two power modules and a charging controller as described in the second aspect, wherein the charging controller is connected to each of the power modules respectively; the charging controller is used to allocate each of the power modules to the charging terminal currently used by the charging system.

[0030] The charging system power allocation method, charging controller, and charging system provided in this embodiment of the invention first acquire the current power allocation data of the charging system when performing power allocation. This power allocation data includes the number of charging terminals, the number of available power modules, the maximum system output power, and the power demand of each charging terminal. The maximum system output power is the maximum allowable output power of the charging system at present. Then, based on the number of charging terminals and the number of available power modules, a first power limit parameter is determined, and based on the first power limit parameter and the power demand of each charging terminal, a second power limit parameter for the corresponding charging terminal is determined. The first power limit parameter is used to characterize the maximum power output by the charging system to a single charging terminal when each charging terminal is allocated at least one power module. Finally, based on the second power limit parameter and the maximum system output power of each charging terminal, power allocation is performed on each charging terminal to obtain the power allocation result. This method does not directly allocate power based on the power demand of the charging terminal, but rather on a second power limit parameter of the charging terminal. This second power limit parameter is determined based on the first power limit parameter and the power demand of each charging terminal. By considering the first power limit parameter in the second power limit parameter involved in power allocation, it avoids charging terminals with large power demand being allocated excessive power, and charging terminals with small power demand being overly current-limited. This achieves a balanced distribution of charging power among charging terminals with large power demand, improves the accuracy and precision of power limiting for charging terminals, and thus maximizes the satisfaction of the simultaneous charging needs of multiple charging terminals while ensuring that the total output power does not exceed the set power limit, thereby improving the user experience in multi-gun charging systems. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of a charging system.

[0033] Figure 2 A schematic flowchart of a power allocation method for a charging system provided in an embodiment of the present invention;

[0034] Figure 3 A schematic flowchart of another power allocation method for a charging system provided in an embodiment of the present invention;

[0035] Figure 4A connection architecture diagram of a 60kW DC charging pile system provided in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of a charging controller provided in an embodiment of the present invention. Detailed Implementation

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Current power allocation algorithms often result in excessive current limiting for charging terminals with low power requirements when allocating power between them. To address this, this invention provides a power allocation method, a charging controller, and a charging system that can improve the accuracy and precision of power limiting for charging terminals, prevent low-power-requirement charging terminals from being over-limited, and enhance the user experience in multi-gun charging systems.

[0039] To facilitate understanding of this embodiment, a power allocation method for a charging system disclosed in this embodiment of the invention will first be described in detail.

[0040] This invention provides a power allocation method for a charging system. This method can be executed by a charging controller, which can be the CCU (Communication Control Unit) of the charging system, referring to a DC charging pile system. The method can be used for single-pile dual-gun DC charging piles or DC group charging (i.e., a power generator + multiple charging terminals). The charging terminal can be the charging gun on the charging pile, used to connect to vehicles such as hybrid electric vehicles or electric vehicles that need charging. See also... Figure 2 The diagram shows a power distribution method for a charging system, which mainly includes the following steps S210 to S230:

[0041] Step S210: Obtain the current power allocation data of the charging system. The power allocation data includes the number of charging terminals, the number of available power modules, the maximum system output power, and the power required by each charging terminal. The maximum system output power is the maximum output power currently allowed by the charging system.

[0042] When a charging terminal in use is detected in the charging system, the power allocation process in steps S210 to S230 is triggered. Power allocation can be performed in real time or through a timed task.

[0043] In some possible embodiments, the number of charging terminals in the power allocation data above can be obtained by obtaining the number of charging terminals currently used by the charging system; wherein, the charging terminals currently used by the charging system refer to the charging terminals that are using the charging system to charge the vehicle.

[0044] In some possible embodiments, the number of available power modules in the power allocation data described above can be obtained by counting the number of idle power modules. Here, idle power modules refer to power modules that have not been allocated to any charging terminal.

[0045] Maximum system output power P max This refers to the maximum allowed output power of the charging system, which can be set by the user. The user can obtain the maximum system output power from a server or central controller; for example, the user can set parameters such as the maximum system output power on a display screen connected to the central controller. It can also be related to the charging system's load constraint scheduling strategy. Therefore, in some possible embodiments, the maximum system output power in the above power allocation data can be obtained in the following ways: obtaining the maximum system output power issued by the charging system's server or central controller, or calculating the maximum system output power according to preset load constraint rules. The specific load constraint rules can be set according to actual needs and are not limited here. It should be noted that the maximum system output power can be less than the rated power of the charging pile. For example, for a charging pile with a rated output power of 60kW, the maximum system output power P... max It can be set to 60kW, or it can be limited to below 60kW.

[0046] In some possible embodiments, the power demand of each charging terminal in the power allocation data described above can be obtained as follows: the current required voltage and current of each charging terminal are obtained, and the power demand of each charging terminal is calculated based on these current required voltage and current. Specifically, the power demand is equal to the product of the required voltage and current.

[0047] The aforementioned required voltage can be obtained by sampling the charging voltage of the charging terminal using voltage acquisition devices such as a voltmeter. The required current can be obtained through sampling or by communicating with the vehicle connected to the charging terminal; that is, the required current originates from the charging terminal. To prevent frequent scheduling due to frequent changes in required power, the acquired charging voltage can be filtered. Based on this, the required voltage can be obtained as follows: when the charging terminal completes pre-charging and enters charging, the actual charging voltage of the charging terminal within a preset time period is collected; each actual charging voltage of the charging terminal is filtered, and the filtered voltage is used as the current required voltage of the charging terminal.

[0048] In practical implementation, the actual charging voltage can be collected every preset time interval, thus collecting multiple actual charging voltages within a preset duration. These multiple actual charging voltages are then filtered to obtain the required voltage. This embodiment of the invention does not limit the specific algorithm used for filtering; for example, after removing outliers, an average filtering algorithm can be used. It should be noted that both the preset time interval and the preset duration can be set according to actual needs and are not limited here. For example, the preset duration could be 5 minutes and the preset time interval could be 10 seconds.

[0049] Step S220: Determine the first power limit parameter based on the number of charging terminals and the number of available power modules, and determine the second power limit parameter of the corresponding charging terminal based on the first power limit parameter and the power requirement of each charging terminal; wherein, the first power limit parameter is used to characterize the maximum power output by the charging system to a single charging terminal when each charging terminal is allocated at least one power module.

[0050] In some possible embodiments, the first power limit parameter can be determined as follows: the first power limit parameter is calculated based on the number of charging terminals, the number of available power modules, and the preset maximum module output power; wherein, the maximum module output power is the maximum output power of a single power module.

[0051] In one possible implementation, the first power limiting parameter P can be calculated using the following formula. lim :

[0052] P lim = (Number of available power modules - Number of charging terminals + 1) × Maximum module output power.

[0053] For example, if the number of available power modules is 2, the number of charging terminals is 2, and the maximum module output power is 30kW, then P lim = (2-2+1)×30kW=30kW.

[0054] In some possible embodiments, the second power limiting parameter can be determined as follows: the smaller of the first power limiting parameter and the power demand of each charging terminal is determined as the second power limiting parameter for that charging terminal. For example, the first power limiting parameter is 30kW, and the power demand P of charging terminal A is... A1 The power requirement P of charging terminal B is 90kW. A2 If the power limit is 10kW, then the second power limit parameter P of charging terminal A is... B1 The second power limiting parameter P of charging terminal B is 30kW. B2 It is 10kW.

[0055] Step S230: Based on the second power limit parameter and the maximum system output power of each charging terminal, power allocation is performed on each charging terminal to obtain the power allocation result.

[0056] In some possible embodiments, step S230 can be implemented by the following sub-steps:

[0057] Sub-step 1: Determine the power ratio of each charging terminal based on the second power limit parameter of each charging terminal.

[0058] In practice, the sum of the second power limiting parameters of each charging terminal can be calculated first to obtain the total power limiting parameter. Then, the ratio of the second power limiting parameter of each charging terminal to the total power limiting parameter can be calculated, and this ratio can be used as the power ratio of the corresponding charging terminal. For example, the second power limiting parameter P of charging terminal A... B1 The second power limiting parameter P of charging terminal B is 30kW. B2 If the power is 10kW, then the total power limit parameter is: P = 30kW + 10kW = 40kW, the power ratio of charging terminal A = 30kW / 40kW = 75%, and the power ratio of charging terminal B = 10kW / 40kW = 25%.

[0059] Sub-step 2: According to the power ratio of each charging terminal, the maximum system output power is allocated to each charging terminal to obtain the initial allocated power for each charging terminal.

[0060] In practice, the initial allocated power PCn for each charging terminal can be calculated using the following formula (where n is the number of the charging terminal):

[0061] P Cn =P max ×(P Bn / P)

[0062] Among them, P max For the maximum system output power, P Bn / P represents the power percentage of the charging terminal, P Bn Let P be the second power limiting parameter of the charging terminal, and let P be the total power limiting parameter obtained by summing up the various second power limiting parameters.

[0063] For example, the maximum system output power P max The second power limiting parameter P of charging terminal A is 60kW. B1 The second power limiting parameter P of charging terminal B is 30kW. B2 If the power limit is 10kW, then the total power limit parameter P is 40kW, and the initial power allocation P of charging terminal A is... C1 =60kW × 75% = 45kW, the initial allocated power P of charging terminal B C2=60kW × 25% = 15kW.

[0064] Sub-step 3: Determine the target power allocation for each charging terminal based on the initial power allocation for each charging terminal.

[0065] In one possible implementation, the initial allocated power of the charging terminal can be directly used as its target allocated power.

[0066] In another possible implementation, the initial allocated power and the required power can be considered together. That is, the smaller of the initial allocated power and the required power of the charging terminal can be determined as the target allocated power of the charging terminal.

[0067] In another possible implementation, the impact of the granularity of the power module output power in the charging system can be further considered. That is, the minimum of the initial allocated power, the required power, and the maximum output power of the power module corresponding to each charging terminal can be determined as the target allocated power of the corresponding charging terminal.

[0068] The maximum output power of the power module refers to the maximum output power of the power module allocated to the corresponding charging terminal. The maximum output power of the power module can be calculated based on the number of available power modules corresponding to the corresponding charging terminal and the maximum module output power (the maximum module output power refers to the maximum output power of a single power module). In specific implementation, the product of the number of available power modules corresponding to the charging terminal and the maximum module output power can be used to determine the maximum output power of the power module corresponding to the charging terminal. The number of available power modules corresponding to the charging terminal can be determined based on a preset power allocation algorithm. The specific method for determining the number of available power modules corresponding to the charging terminal based on the preset power allocation algorithm can refer to relevant existing technologies, and will not be elaborated here.

[0069] The power allocation method for a charging system provided in this invention does not directly allocate power based on the power demand of the charging terminal, but rather based on a second power limit parameter of the charging terminal. This second power limit parameter is determined according to a first power limit parameter and the power demand of each charging terminal. By considering the first power limit parameter in the second power limit parameter involved in the power allocation, it can avoid charging terminals with large power demand being allocated excessive power, and charging terminals with small power demand being overly current-limited. This achieves a balanced allocation of charging power among charging terminals with large power demand, improves the accuracy and precision of power limiting for charging terminals, and thus maximizes the satisfaction of the simultaneous charging needs of multiple charging terminals while ensuring that the total output power does not exceed the set power limit, thereby improving the user experience in a multi-gun charging system.

[0070] Considering that when the sum of the power demands of each charging terminal is less than or equal to the maximum system output power, the power allocation process in steps S220 and S230 can be skipped, and the target allocation power of the charging terminal can be determined directly based on its power demand. Therefore, in this embodiment of the invention, before step S220, the power allocation method for the charging system further includes: summing the power demands of each charging terminal to obtain the total power demand; determining whether the total power demand is greater than the maximum system output power; if yes, executing step S220; if no, determining the target allocation power of the corresponding charging terminal based on its power demand.

[0071] Furthermore, for cases where the total power demand is less than or equal to the maximum system output power, in one possible implementation, the power demand of each charging terminal can be directly determined as the target allocated power for that charging terminal. In another possible implementation, the influence of the granularity of the power module output power in the charging system can be further considered; that is, the smaller of the power demand of each charging terminal and the maximum output power of the power module corresponding to that charging terminal can be determined as the target allocated power for that charging terminal.

[0072] In some other possible embodiments, for cases where the total demand power is less than or equal to the maximum system output power, the power allocation process of steps S220 and S230 can also be performed, simply by replacing the maximum system output power with the total demand power. For example, calculate the demand power and (i.e., the total demand power) P. A1 +P A2 If P A1 +P A2 Less than or equal to P max (i.e., maximum system output power), then P A1 +P A2 Replace P max The initial power allocation for charging terminal A, participating in the power limiting algorithm, is: P C1 =(P A1 +P A2 )×(P B1 / P); The initial power allocation of charging terminal B is: P C2 =(P A1 +P A2 )×(P B2 / P).

[0073] For ease of understanding, please refer to the following: Figure 3 The power allocation method of the above charging system is described in detail. It should be noted that... Figure 3 Before step S330, it is necessary to calculate the total power demand of multiple charging terminals; if the total power demand is less than or equal to P maxStep S330 and subsequent power limiting steps are not executed; a single charging terminal only considers the limit of the available module's rated power (i.e., the maximum output power of the power module); if the total demand power is greater than P... max Execute step S330 and subsequent power limiting steps.

[0074] like Figure 3 As shown, the power distribution method of this charging system includes the following steps:

[0075] Step S310: Obtain the maximum allowable output power P of the charging system. max .

[0076] The power P max It can be issued by the server or central controller of the charging system, or it can be calculated according to preset load constraint rules.

[0077] Step S320: Calculate the power demand P of all current charging terminals. An (n = 1, 2, ...).

[0078] Where n is the number of the charging terminal. The required voltage and current of all current charging terminals can be obtained, for example, by sampling the required voltage and current values, and then the required power P of the current charging terminal can be calculated. An Specifically, in the case of multiple charging terminals, the power requirement of each charging terminal is calculated one by one.

[0079] Optional: When pre-charging is complete and charging begins, the required power is calculated using the actual charging voltage and required current of the current charging terminal. The actual charging voltage of the charging terminal can be obtained from a meter or by sampling or other methods.

[0080] To prevent frequent scheduling due to frequent changes in power demand, the actual charging voltage obtained can be filtered.

[0081] Step S330, calculate the current power limit P lim = (Number of available power modules – Number of charging terminals + 1) × Maximum output power of a single module.

[0082] The maximum output power of a single module is the maximum module output power. Here, the power limit P... lim It is an intermediate power parameter, not the final output power that limits a single gun.

[0083] Step S340, take P An With P lim The smaller value in is P Bn (n = 1, 2, ...).

[0084] Calculate power PBn =min(P An P lim That is, the power in steps S320 and S330 is taken as smaller.

[0085] Step S350, calculate P Bn The power and P=P B1 +P B2 +...

[0086] Step S360: Determine the initial allocated power P for each charging terminal. Cn =P max ×(P Bn / P).

[0087] Step S370, P Cn P An The target power allocation for each charging terminal is determined by the smallest of the maximum output power of the power modules.

[0088] The power P Cn The power value of the charging terminal is determined by taking the smaller of the power demand of the charging terminal. When the power value is less than or equal to the rated power of the available module, the power value is determined as the target allocated power after the final current limiting. When the power value is greater than the rated power of the available module, the rated power of the available module is determined as the target allocated power after the final current limiting.

[0089] The charging system power allocation method provided in this embodiment of the invention calculates the power based on the maximum output power of a single power module by statistically analyzing the number of charging terminals, the required power, the maximum system output power, and the number of available power modules, thereby allocating different output power to each charging terminal and maintaining the total system power within the maximum system output power.

[0090] The following is based on Figure 4 Taking the 60kW DC charging pile system shown as an example, the power allocation method of the above charging system is introduced exemplarily.

[0091] like Figure 4As shown, a DC charging pile with a total output power of 60kW consists of two 30kW power modules, namely power module 1 and power module 2. The two power modules are connected to the charging controller. Relay CB1 is used to connect power module 1 and power module 2. Relays CB2 and CB3 are used to connect power module 1 to charging gun A and power module 2 to charging gun B, respectively. Charging gun A is used to charge vehicle 1 and charging gun B is used to charge vehicle 2. The maximum output power of a single gun power module is 30kW, and the maximum system output power is less than or equal to 60kW. When the charging station limits the power output of a single pile due to load constraints and energy scheduling, the maximum system output power of the 60kW DC charging pile may be less than 60kW.

[0092] Before executing the power limiting algorithm, determine the power demand P of charging gun A. A1 The power demand P of charging gun B A2 The sum of P A1 +P A2 With P max Relationship, P A1 +P A2 >P max Execute the following power limiting algorithm; if P A1 +P A2 ≤P max Determine the relationship between the power requirement of a single gun and the maximum output power of its power module. For example, P A1 For 40kW, P A2 For a 10kW charging station, there are two 30kW power modules in a 60kW charging pile. Determine P... A1 There is one available power module. The maximum output power of the power module of charging gun A is 30kW. P A1 The current is limited to 30kW, and PA2 outputs 10kW.

[0093] The power limiting algorithm is as follows:

[0094] S1: Maximum system output power P max =60kW, obtain the required power P of charging gun A. A1 The power requirement P of charging gun B A2 .

[0095] S2: The number of available power modules is 2, and the number of charging guns (i.e., charging terminals) is 2. Calculate the power limiting parameter P. lim = (Number of available power modules - Number of current charging terminals + 1) × Maximum output power of a single module = (2 - 2 + 1) × 30kW = 30kW.

[0096] S3: Determine the required power P An The smaller of the power limiting parameters, namely PBn =min(P An P lim As a transitional power parameter, for example, if the power requirement of charging gun A is 100kW and the power requirement of charging gun B is 10kW, then P B1 =min(100kW,30kW)=30kW, P B2 =min(10kW,30kW)=10kW.

[0097] S4: The sum of transition power parameters P = P B1 +P B2 =40kW, the initial power allocation of charging gun A is: P C1 =P max ×(P B1 / P)=60×(30 / 40)=45kW, the initial power allocation of charging gun B is: P C2 =P max ×(P B2 / P)=60×(10 / 40)=15kW.

[0098] S5: The minimum of the required power, the initial allocated power, and the maximum output power of the power module is taken as the final target allocated power. That is, take the smaller of "100kW, 30kW, 45kW" and get 30kW as the final target allocated power of charging gun A; take the smaller of "10kW, 30kW, 15kW" and get 10kW as the final target allocated power of charging gun B.

[0099] In summary, the power allocation method for charging systems provided by the embodiments of the present invention improves the accuracy and precision of power limiting for charging terminals in the power allocation algorithm, avoids power limiting for low-power charging terminals, and improves the user experience in multi-gun charging systems.

[0100] Corresponding to the above-described power allocation method for the charging system, this embodiment of the invention also provides a charging controller. For example... Figure 5 As shown, an embodiment of the present invention provides a charging controller 500, including a processor 501, a memory 502 and a bus. The memory 502 stores a computer program that can run on the processor 501. When the charging controller 500 is running, the processor 501 and the memory 502 communicate through the bus, and the processor 501 executes the computer program to implement the above-mentioned charging system power distribution method.

[0101] Specifically, the memory 502 and processor 501 mentioned above can be general-purpose memory and processor, without any specific limitations here.

[0102] This invention also provides a charging system, including at least two power modules and the aforementioned charging controller, wherein the charging controller is connected to each power module respectively; the charging controller is used to allocate each power module to the charging terminal currently used by the charging system.

[0103] The charging terminals currently used by this charging system refer to those that are currently using the system to charge vehicles. It should be noted that the specific power allocation method of the charging controller can be found in the relevant section on charging system power allocation methods, and will not be repeated here.

[0104] This invention also provides a storage medium storing a computer program, which, when executed by a processor, performs the power allocation method for the charging system described in the preceding method embodiments. The storage medium includes various media capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), RAM, magnetic disk, or optical disk.

[0105] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0106] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of methods and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0107] In the several embodiments provided in this application, it should be understood that the disclosed methods can be implemented in other ways. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power distribution method for a charging system, characterized in that, include: Obtain the current power allocation data of the charging system. The power allocation data includes the number of charging terminals, the number of available power modules, the maximum system output power, and the power requirement of each charging terminal. The maximum system output power is the maximum output power currently allowed by the charging system. Based on the number of charging terminals and the number of available power modules, a first power limit parameter is determined, and based on the first power limit parameter and the power requirement of each charging terminal, a second power limit parameter for the corresponding charging terminal is determined; wherein, the first power limit parameter is used to characterize the maximum power output by the charging system to a single charging terminal when each charging terminal is allocated at least one power module; Based on the second power limit parameter of each charging terminal and the maximum system output power, power allocation is performed on each charging terminal to obtain a power allocation result, including: determining the power ratio of each charging terminal based on the second power limit parameter of each charging terminal; allocating power to each charging terminal according to the maximum system output power based on the power ratio of each charging terminal to obtain the initial allocated power of each charging terminal; and determining the target allocated power of the corresponding charging terminal based on the initial allocated power of each charging terminal.

2. The power distribution method for a charging system according to claim 1, characterized in that, The acquisition of the current power allocation data of the charging system includes: Obtain the number of charging terminals currently in use by the charging system to get the total number of charging terminals; Obtain the current required voltage and current of each charging terminal, and calculate the required power of each charging terminal based on the current required voltage and current of each charging terminal.

3. The power distribution method for a charging system according to claim 1, characterized in that, Before determining the first power limit parameter based on the number of charging terminals and the number of available power modules, the charging system power allocation method further includes: The total power demand is obtained by summing the power demand of each of the charging terminals. Determine whether the total power demand is greater than the maximum system output power; If so, perform the step of determining the first power limit parameter based on the number of charging terminals and the number of available power modules.

4. The power distribution method for a charging system according to claim 3, characterized in that, The power allocation method for the charging system also includes: If not, the smaller of the required power of each charging terminal and the maximum output power of the power module corresponding to the charging terminal shall be determined as the target allocated power of the corresponding charging terminal.

5. The power distribution method for a charging system according to claim 1, characterized in that, The step of determining the first power limit parameter based on the number of charging terminals and the number of available power modules includes: The first power limit parameter is calculated based on the number of charging terminals, the number of available power modules, and the preset maximum module output power; wherein, the maximum module output power is the maximum output power of a single power module.

6. The power distribution method for a charging system according to claim 1, characterized in that, The step of determining the second power limit parameter for each charging terminal based on the first power limit parameter and the power demand of each charging terminal includes: The smaller of the first power limit parameter and the power requirement of each charging terminal is determined as the second power limit parameter of the corresponding charging terminal.

7. The power distribution method for a charging system according to claim 1, characterized in that, Determining the target allocation power for each charging terminal based on its initial allocation power includes: The minimum of the initial allocated power, the required power, and the maximum output power of the power module corresponding to each charging terminal is determined as the target allocated power of the corresponding charging terminal.

8. A charging controller, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor executes the computer program, it implements the power distribution method of the charging system as described in any one of claims 1-7.

9. A charging system, characterized in that, It includes at least two power modules and a charging controller as described in claim 8, wherein the charging controller is connected to each of the power modules respectively; the charging controller is used to allocate each of the power modules to the charging terminal currently used by the charging system.

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